Screen size
C21A1.8"
Z10Winner: 2.0"+10%
Quick verdict
Z10 leads the measured specs 4-1.
Measured wins
C21A
1
spec wins
Ties
6
equal specs
Z10
4
spec wins
Overall winner
Screen size
Technology
C21A
GSM
Z10
GSM
2G bands
C21A
GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 - CM21A003
Z10
GSM 850 / 900 / 1800 / 1900 - SIM 1, GSM 850 / 900 / 1800 / 1900 - SIM 2
GPRS
C21A
Up to 48 kbps
Z10
Up to 48 kbps
EDGE
C21A
No
Resolution
Refresh rate
Peak brightness
Pixel density
equal specsCPU speed
RAM
Storage
Main camera
Front camera
Battery
Wired charging
Weight
Thickness
equal specsIP rating
Wi‑Fi
Bluetooth
USB
5G support
equal specsNFC
equal specs3.5mm jack
equal specsSD card
equal specsStereo speakers
Z10
No
Announced
C21A
2013, March. Released 2013, April
Z10
2013, November. Released 2014, January
Status
C21A
Discontinued
Z10
Discontinued
Dimensions
C21A
106 x 45 x 14.5 mm (4.17 x 1.77 x 0.57 in)
Z10
113.2 x 55.5 x 14.5 mm (4.46 x 2.19 x 0.57 in)
Weight
C21A
73 g without battery (2.57 oz)
Z10
90 g without battery (3.17 oz)
SIM
C21A
Dual SIM (Mini-SIM)
Z10
Dual SIM (Mini-SIM)
Other
C21A
-
Z10
Flashlight SOS button
Type
C21A
TFT, 256K colors
Z10
TFT, 65K colors
Size
C21A
1.8 inches, 10.2 cm2 (~21.4% screen-to-body ratio)
Z10
2.0 inches, 12.6 cm2 (~20.1% screen-to-body ratio)
Resolution
C21A
128 x 160 pixels (~114 ppi density)
Z10
144 x 176 pixels (~114 ppi density)
Card slot
C21A
microSDHC
Z10
microSDHC
Phonebook
C21A
Yes
Z10
Yes
Call records
C21A
Yes
Z10
Yes
Internal
C21A
32Mb 32Mb RAM
Z10
32Mb 32Mb RAM
Single
C21A
VGA
Z10
VGA
Video
C21A
No
Z10
Yes
Other
C21A
No
Z10
No
Loudspeaker
C21A
Yes
Z10
Yes
3.5mm jack
C21A
No
Z10
No
WLAN
C21A
No
Z10
No
Bluetooth
C21A
2.0
Z10
2.1
Positioning
C21A
No
Z10
No
NFC
C21A
No
Z10
No
Radio
C21A
Stereo FM radio
Z10
Stereo FM radio; buit-in antenna
USB
C21A
microUSB
Z10
microUSB
Sensors
C21A
Z10
Messaging
C21A
SMS, IM
Z10
SMS, MMS
Games
C21A
No
Z10
Yes
Java
C21A
No
Z10
No
Other
C21A
Video Player Music Player Organizer Whatsapp
Z10
Music/Video player Organizer Calendar Calculator Voice memo
Type
C21A
Li-Ion 600 mAh, removable
Z10
Li-Ion 1000 mAh, removable
Stand-by
C21A
Up to 200 h
Z10
Up to 290 h
Talk time
C21A
Up to 4 h
Z10
Up to 7 h
Colors
C21A
Black, White, Blue, Green, Purple, Red, Fuchsia
Z10
Black, White, Blue